Coal-bed gas well concentric pipe pulverized coal discharging device and coal discharging method

Abstract

The coal-bed gas well concentric pipe pulverized coal discharging device comprises an inner pipe with a seal, an adjusting sleeve with a seal is arranged outside the inner pipe in a sleeving mode, an outer pipe with a seal is arranged outside the adjusting sleeve in a sleeving mode, a screw rod is spirally wound on the outer wall of the adjusting sleeve, a plurality of bristles are arranged on the screw rod, and a feeding port is formed in the end face of the outer pipe. The portion, away from the feeding port, of the outer pipe communicates with a collecting assembly and a motor assembly, the motor assembly is connected with one end of a screw rod, the other end of the screw rod is rotationally connected with the side wall of an adjusting sleeve, the end, away from the feeding port, of the adjusting sleeve is connected with an annular adjusting assembly, the adjusting assembly is sleeved with the inner pipe, and a plurality of first through holes are formed in the side wall of the inner pipe. A plurality of second through holes are formed in the side wall of the adjusting sleeve; the invention further discloses a coal discharging method of the coal-bed gas well concentric pipe pulverized coal discharging device. The problem that in the prior art, in the coal-bed gas collecting process, pulverized coal is prone to being adhered to a pipeline to cause blockage, and production is affected is solved.

Description

Technical Field

[0001] This invention belongs to the technical field of coal powder discharge devices, and relates to a coal powder discharge device with a concentric tube in a coalbed methane well. This invention also relates to a coal discharge method for the aforementioned coal powder discharge device with a concentric tube in a coalbed methane well. Background Technology

[0002] In existing coalbed methane well concentric pipe coal dust discharge devices, coalbed methane carrying coal dust enters the outer pipe during use. The coal dust is intercepted by the inner pipe, and the coalbed methane eventually enters the inner pipe and is discharged. During this process, the coal dust adheres to the outer wall of the inner pipe and the inner wall of the outer pipe, making it difficult to clean the outer wall of the inner pipe and the inner wall of the outer pipe quickly and easily, which can easily lead to blockage and affect the performance. Therefore, it is necessary to provide a coalbed methane well concentric pipe coal dust discharge device and method to solve the above-mentioned technical problems. Summary of the Invention

[0003] The purpose of this invention is to provide a coal powder discharge device for concentric pipes in coalbed methane wells, which solves the problem in the prior art where coal powder easily adheres to the pipes during the coalbed methane collection process, causing blockages and affecting production.

[0004] Another objective of this invention is to provide a coal discharge method for the aforementioned coalbed methane well concentric pipe coal powder discharge device, which solves the problem of difficulty in adjusting the size of the coal powder through-hole in the prior art.

[0005] The technical solution adopted in this invention is a coalbed methane well concentric pipe coal powder discharge device, including a sealed inner pipe, an inner pipe with a sealed adjusting sleeve, an adjusting sleeve with a sealed outer pipe, a spiral rod spirally wound on the outer wall of the adjusting sleeve, the spiral rod having several bristles, a feed inlet on the end face of the outer pipe, a collection component and a motor component connected to the outer pipe away from the feed inlet, the motor component being connected to one end of the spiral rod, the other end of the spiral rod being rotatably connected to the side wall of the adjusting sleeve, an annular adjusting component being connected to the end of the adjusting sleeve away from the feed inlet, the adjusting component being sleeved on the inner pipe, a number of first through holes being opened on the side wall of the inner pipe, and a number of second through holes being opened on the side wall of the adjusting sleeve.

[0006] The invention is further characterized by:

[0007] The feed inlet is located between the outer tube and the adjusting sleeve.

[0008] The adjusting sleeve has an annular rotating groove along the axial direction on the side wall near the feed inlet, and the end of the screw rod near the feed inlet is engaged with the rotating groove.

[0009] The bristles contact the outer wall of the adjusting sleeve and the inner wall of the outer tube, respectively.

[0010] The collection component includes a spherical temporary storage box, one end of which is connected to a guide hopper, which is connected to an outer tube; the other end of the temporary storage box is connected to an outlet tube, which is fitted with a sealing plug; a connecting rod is provided inside the temporary storage box, one end of which is connected to the sealing plug, and several soft scrapers are connected to the side wall of the connecting rod.

[0011] The motor assembly includes a housing box containing a servo motor. A drive gear is fitted onto the output end of the servo motor, and the drive gear meshes with a driven gear. A horizontal shaft is fitted onto the driven gear, and both ends of the horizontal shaft are rotatably connected to the inner wall of the housing box. An external gear meshes with the driven gear, and a rotating shaft is fitted onto the external gear. A connecting sleeve is fitted onto the rotating shaft located outside the external gear. The connecting sleeve is located at the connection point between the outer tube port and the adjusting sleeve port. The rotating shaft is connected to a screw rod.

[0012] The adjusting assembly includes a first bearing ring sleeved on the inner tube, which is connected to the port of the adjusting sleeve furthest from the feed inlet. A second bearing ring is sleeved on the inner tube, with the first bearing ring located between the adjusting sleeve and the second bearing ring. The end face of the second bearing ring is in contact with the end face of the first bearing ring. The surface of the second bearing ring furthest from the first bearing ring has a scale. The end face of the second bearing ring has two opposing positioning holes, each fitted with a pin. A spring is fitted on the pin, with the spring diameter not less than the diameter of the positioning hole. The end face of the first bearing ring has several evenly distributed limiting holes, which engage with the pins. One end of a U-shaped pointer is connected to the side wall of the first bearing ring, with the other end of the U-shaped pointer located at the scale.

[0013] Another technical solution adopted in this invention is a coal discharge method using a coalbed methane well concentric pipe coal pulverizer, comprising the following operating steps:

[0014] Step 1: Rotate the first bearing ring to adjust the scale value, and insert the pin into the limiting hole and positioning hole;

[0015] Step 2: Place the outer pipe into the designated position for discharging pulverized coal and turn on the servo motor;

[0016] Step 3: Collect the coal powder into the collection component.

[0017] The beneficial effects of this invention are as follows: the coalbed methane well concentric pipe coal powder discharge device is equipped with brush bristles. As the motor components rotate, the brush bristles brush away the coal powder adhering to the outer wall of the adjusting sleeve and the inner wall of the outer pipe. At the same time, the rotation of the brush bristles generates airflow, which promotes the coal powder to enter the inner pipe for collection through the first and second through holes. An adjusting component is also provided. By partially aligning the first and second through holes, the size of the through holes can be adjusted according to specific needs, making it widely applicable. The collection component is equipped with a connecting rod. When collecting coal powder, the connecting rod can move the coal powder in the temporary storage box for easy removal. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the coalbed methane well concentric pipe coal powder discharge device of the present invention;

[0019] Figure 2 This is a schematic diagram of the collection component in the coalbed methane well concentric pipe coal powder discharge device of the present invention;

[0020] Figure 3 This is a schematic diagram of the motor assembly in the coalbed methane well concentric pipe coal powder discharge device of the present invention;

[0021] Figure 4 This is a schematic diagram of the regulating component in the coalbed methane well concentric pipe coal powder discharge device of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the second bearing ring in the coalbed methane well concentric pipe coal powder discharge device of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the first bearing ring in the coalbed methane well concentric pipe coal powder discharge device of the present invention.

[0024] In the diagram, 1. Outer tube, 2. Inner tube, 3. Adjusting sleeve, 4. First through hole, 5. Second through hole, 6. Spiral rod, 7. Brush bristles, 8. Motor assembly, 9. Collection assembly, 91. Guide hopper, 92. Temporary storage box, 93. Outlet tube, 94. Sealing plug, 95. Connecting rod, 96. Soft scraper, 10. Feed inlet, 11. Container box, 12. Servo motor, 13. Drive gear, 14. Horizontal shaft, 15. Driven gear, 16. External gear, 17. Connecting sleeve, 18. First bearing ring, 19. U-shaped pointer, 20. Adjusting assembly, 201. Second bearing ring, 202. Scale, 203. Positioning hole, 204. Pin, 205. Spring, 206. Limiting hole, 21. Rotating shaft, 22. Rotating groove. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] The coalbed methane well concentric pipe coal powder discharge device of the present invention, such as Figure 1 As shown, it includes an inner tube 2 with a seal, an adjusting sleeve 3 with a seal is fitted over the inner tube 2, and an outer tube 1 with a seal is fitted over the adjusting sleeve 3. A spiral rod 6 is spirally wound around the outer wall of the adjusting sleeve 3, and several bristles 7 are provided on the spiral rod 6. A feed inlet 10 is opened on the end face of the outer tube 1. A collection component 9 and a motor component 8 are respectively connected to the outer tube 1 away from the feed inlet 10. The motor component 8 is connected to one end of the spiral rod 6, and the other end of the spiral rod 6 is rotatably connected to the side wall of the adjusting sleeve 3. An annular adjusting component 20 is connected to the end of the adjusting sleeve 3 away from the feed inlet 10. The adjusting component 20 is fitted with the inner tube 2. Several first through holes 4 are opened on the side wall of the inner tube 2, and several second through holes 5 are opened on the side wall of the adjusting sleeve 3.

[0027] The feed inlet 10 is located between the outer tube 1 and the adjusting sleeve 3.

[0028] The adjusting sleeve 3 has an annular rotating groove 22 on its side wall near the feed inlet 10 along the axial direction, and the end of the screw rod 6 near the feed inlet 10 is engaged with the rotating groove 22.

[0029] The bristles 7 contact the outer wall of the adjusting sleeve 3 and the inner wall of the outer tube 1 respectively.

[0030] like Figure 2 As shown, the collection component 9 includes a spherical temporary storage box 92. One end of the temporary storage box 92 is connected to a guide bucket 91, which is connected to the outer tube 1. The other end of the temporary storage box 92 is connected to an outlet tube 93, which is fitted with a sealing plug 94. A connecting rod 95 is provided inside the temporary storage box 92. One end of the connecting rod 95 is connected to the sealing plug 94, and several soft scrapers 96 are connected to the side wall of the connecting rod 95.

[0031] like Figure 3 As shown, the motor assembly 8 includes a housing box 11, in which a servo motor 12 is housed. A drive gear 13 is fitted onto the output end of the servo motor 12. The drive gear 13 meshes with a driven gear 15. A horizontal shaft 14 is fitted inside the driven gear 15. Both ends of the horizontal shaft 14 are rotatably connected to the inner wall of the housing box 11. The driven gear 15 meshes with an external gear 16. A rotating shaft 21 is fitted inside the external gear 16. A connecting sleeve 17 is fitted onto the rotating shaft 21 located outside the external gear 16. The connecting sleeve 17 is located at the connection point between the port of the outer tube 1 and the port of the adjusting sleeve 3. The rotating shaft 21 is connected to the screw rod 6.

[0032] The adjusting assembly 20 includes a first bearing ring 18 sleeved on the inner tube 2, the first bearing ring 18 being connected to the port of the adjusting sleeve 3 furthest from the feed inlet 10, and a second bearing ring 201 sleeved on the inner tube 2, the first bearing ring 18 being located between the adjusting sleeve 3 and the second bearing ring 201, the end face of the second bearing ring 201 being in contact with the end face of the first bearing ring 18, such as... Figure 4 As shown; the second bearing ring 201 has a scale 202 on its surface away from the first bearing ring 18, and two positioning holes 203 are opened on the end face of the second bearing ring 201, which are positioned opposite each other. Figure 5 As shown; a pin 204 is fitted into the positioning hole 203, and a spring 205 is sleeved on the pin 204. The diameter of the spring 205 is not less than the diameter of the positioning hole 203. Several evenly distributed limiting holes 206 are opened on the end face of the first bearing ring 18. The limiting holes 206 cooperate with the pin 204, as shown. Figure 6 As shown; one end of a U-shaped pointer 19 is connected to the side wall of the first bearing ring 18, and the other end of the U-shaped pointer 19 is set at the scale 202.

[0033] The coal discharge method of the concentric pipe coal pulverizer in a coalbed methane well includes the following operating steps:

[0034] Step 1: Rotate the first bearing ring 18 to adjust the value of the scale 202, and insert the pin 204 into the limiting hole 206 and the positioning hole 203;

[0035] Step 2: Place the outer pipe 1 into the designated position for discharging pulverized coal and turn on the servo motor 12;

[0036] Step 3: Collect the coal powder into the collection component 9.

[0037] The brush 7 removes coal dust from the outer wall of the adjusting sleeve 3 and the inner wall of the outer tube 1 during the rotation of the spiral rod 6, ensuring unobstructed passage. The rotation of the brush 7 generates airflow, which reduces the pressure inside the outer tube 1, facilitating the entry of coal dust into the outer tube 1 from the feed inlet 10. The adjusting component 20 can rotate the adjusting sleeve 3 by rotating the first bearing ring 18, thereby adjusting the space between the first through hole 4 and the second through hole 5 for coal dust, suitable for different scenarios. The scale 202 can accurately calculate the space size from the changes in the scale. The feed inlet 10 is located at the end face between the outer tube 1 and the adjusting sleeve 3, allowing for thorough screening and collection of coal dust.

[0038] One end of the screw rod 6 is driven to rotate by the motor assembly 8, while the other end of the screw rod 6 rotates within the rotating groove 22, ensuring the stability of the screw rod 6 during rotation. The rotation of the servo motor 12 drives the drive gear 13 to rotate, and under the transmission of force, it drives the rotating shaft 21 to rotate. The rotating shaft 21 is connected to one end of the screw rod 6, thereby driving the screw rod 6 to rotate. During the rotation, in order to ensure that the force can be fully transmitted to the end of the screw rod 6 near the feed port 10, a servo motor 12 with a larger power is selected.

[0039] In the collecting component 9, the guide bucket 91 is inverted cone-shaped, which facilitates the collection of coal powder into the temporary storage box 92. When the coal powder collected in the temporary storage box 92 is discharged, the sealing plug 94 is gently rotated. The rotation and removal of the sealing plug 94 will drive the coal powder to flow through the connecting rod 95 and the soft scraper 96, which facilitates the discharge of coal powder.

[0040] Example 1

[0041] The coalbed methane well concentric pipe coal powder discharge device of the present invention includes a sealed inner pipe 2, an inner pipe 2 with a sealed adjusting sleeve 3 is fitted over the inner pipe 2, and an outer pipe 1 with a sealed outer pipe is fitted over the adjusting sleeve 3. A spiral rod 6 is spirally wound on the outer wall of the adjusting sleeve 3, and a plurality of bristles 7 are provided on the spiral rod 6. A feed inlet 10 is opened on the end face of the outer pipe 1. A collection component 9 and a motor component 8 are respectively connected to the outer pipe 1 away from the feed inlet 10. The motor component 8 is connected to one end of the spiral rod 6, and the other end of the spiral rod 6 is rotatably connected to the side wall of the adjusting sleeve 3. An annular adjusting component 20 is connected to the end of the adjusting sleeve 3 away from the feed inlet 10. The adjusting component 20 is fitted with the inner pipe 2. A plurality of first through holes 4 are opened on the side wall of the inner pipe 2, and a plurality of second through holes 5 are opened on the side wall of the adjusting sleeve 3.

[0042] The motor assembly 8 includes a housing box 11, which houses a servo motor 12. The output end of the servo motor 12 is fitted with a drive gear 13, which meshes with a driven gear 15. A horizontal shaft 14 is fitted inside the driven gear 15, and both ends of the horizontal shaft 14 are rotatably connected to the inner wall of the housing box 11. The driven gear 15 meshes with an external gear 16, which is fitted with a rotating shaft 21. A connecting sleeve 17 is fitted on the rotating shaft 21 outside the external gear 16. The connecting sleeve 17 is located at the connection point between the port of the outer tube 1 and the port of the adjusting sleeve 3. The rotating shaft 21 is connected to the screw rod 6.

[0043] The adjusting assembly 20 includes a first bearing ring 18 sleeved on the inner tube 2, the first bearing ring 18 being connected to the port of the adjusting sleeve 3 away from the feed inlet 10, a second bearing ring 201 sleeved on the inner tube 2, the first bearing ring 18 being located between the adjusting sleeve 3 and the second bearing ring 201, the end face of the second bearing ring 201 being in contact with the end face of the first bearing ring 18, the surface of the second bearing ring 201 away from the first bearing ring 18 having a scale 202, the end face of the second bearing ring 201 having two positioning holes 203 with opposite positions, the positioning holes 203 being fitted with pins 204, the pins 204 being fitted with springs 205, the diameter of the springs 205 being not less than the diameter of the positioning holes 203, the end face of the first bearing ring 18 having several evenly distributed limiting holes 206, the limiting holes 206 being fitted with the pins 204, one end of a U-shaped pointer 19 being connected to the side wall of the first bearing ring 18, the other end of the U-shaped pointer 19 being located at the scale 202.

[0044] The coal discharge method of the concentric pipe coal pulverizer in a coalbed methane well includes the following operating steps:

[0045] Step 1: Rotate the first bearing ring 18 to adjust the value of the scale 202, and insert the pin 204 into the limiting hole 206 and the positioning hole 203;

[0046] Step 2: Place the outer pipe 1 into the designated position for discharging pulverized coal and turn on the servo motor 12;

[0047] Step 3: Collect the coal powder into the collection component 9.

[0048] Example 2

[0049] The coalbed methane well concentric pipe coal powder discharge device of the present invention includes a sealed inner pipe 2, an inner pipe 2 with a sealed adjusting sleeve 3 is fitted over the inner pipe 2, and an outer pipe 1 with a sealed outer pipe is fitted over the adjusting sleeve 3. A spiral rod 6 is spirally wound on the outer wall of the adjusting sleeve 3, and a plurality of bristles 7 are provided on the spiral rod 6. A feed inlet 10 is opened on the end face of the outer pipe 1. A collection component 9 and a motor component 8 are respectively connected to the outer pipe 1 away from the feed inlet 10. The motor component 8 is connected to one end of the spiral rod 6, and the other end of the spiral rod 6 is rotatably connected to the side wall of the adjusting sleeve 3. An annular adjusting component 20 is connected to the end of the adjusting sleeve 3 away from the feed inlet 10. The adjusting component 20 is fitted with the inner pipe 2. A plurality of first through holes 4 are opened on the side wall of the inner pipe 2, and a plurality of second through holes 5 are opened on the side wall of the adjusting sleeve 3.

[0050] The feed inlet 10 is located between the outer tube 1 and the adjusting sleeve 3.

[0051] The motor assembly 8 includes a housing box 11, which houses a servo motor 12. The output end of the servo motor 12 is fitted with a drive gear 13, which meshes with a driven gear 15. A horizontal shaft 14 is fitted inside the driven gear 15, and both ends of the horizontal shaft 14 are rotatably connected to the inner wall of the housing box 11. The driven gear 15 meshes with an external gear 16, which is fitted with a rotating shaft 21. A connecting sleeve 17 is fitted on the rotating shaft 21 outside the external gear 16. The connecting sleeve 17 is located at the connection point between the port of the outer tube 1 and the port of the adjusting sleeve 3. The rotating shaft 21 is connected to the screw rod 6.

[0052] The adjusting assembly 20 includes a first bearing ring 18 sleeved on the inner tube 2, the first bearing ring 18 being connected to the port of the adjusting sleeve 3 away from the feed inlet 10, a second bearing ring 201 sleeved on the inner tube 2, the first bearing ring 18 being located between the adjusting sleeve 3 and the second bearing ring 201, the end face of the second bearing ring 201 being in contact with the end face of the first bearing ring 18, the surface of the second bearing ring 201 away from the first bearing ring 18 having a scale 202, the end face of the second bearing ring 201 having two positioning holes 203 with opposite positions, the positioning holes 203 being fitted with pins 204, the pins 204 being fitted with springs 205, the diameter of the springs 205 being not less than the diameter of the positioning holes 203, the end face of the first bearing ring 18 having several evenly distributed limiting holes 206, the limiting holes 206 being fitted with the pins 204, one end of a U-shaped pointer 19 being connected to the side wall of the first bearing ring 18, the other end of the U-shaped pointer 19 being located at the scale 202.

[0053] The coal discharge method of the concentric pipe coal pulverizer in a coalbed methane well includes the following operating steps:

[0054] Step 1: Rotate the first bearing ring 18 to adjust the value of the scale 202, and insert the pin 204 into the limiting hole 206 and the positioning hole 203;

[0055] Step 2: Place the outer pipe 1 into the designated position for discharging pulverized coal and turn on the servo motor 12;

[0056] Step 3: Collect the coal powder into the collection component 9.

[0057] Example 3

[0058] The coalbed methane well concentric pipe coal powder discharge device of the present invention, such as Figure 1 As shown, it includes an inner tube 2 with a seal, an adjusting sleeve 3 with a seal is fitted over the inner tube 2, and an outer tube 1 with a seal is fitted over the adjusting sleeve 3. A spiral rod 6 is spirally wound around the outer wall of the adjusting sleeve 3, and several bristles 7 are provided on the spiral rod 6. A feed inlet 10 is opened on the end face of the outer tube 1. A collection component 9 and a motor component 8 are respectively connected to the outer tube 1 away from the feed inlet 10. The motor component 8 is connected to one end of the spiral rod 6, and the other end of the spiral rod 6 is rotatably connected to the side wall of the adjusting sleeve 3. An annular adjusting component 20 is connected to the end of the adjusting sleeve 3 away from the feed inlet 10. The adjusting component 20 is fitted with the inner tube 2. Several first through holes 4 are opened on the side wall of the inner tube 2, and several second through holes 5 are opened on the side wall of the adjusting sleeve 3.

[0059] The collection component 9 includes a spherical temporary storage box 92. One end of the temporary storage box 92 is connected to a guide hopper 91, which is connected to the outer tube 1. The other end of the temporary storage box 92 is connected to an outlet tube 93, which is fitted with a sealing plug 94. A connecting rod 95 is provided inside the temporary storage box 92. One end of the connecting rod 95 is connected to the sealing plug 94, and several soft scrapers 96 are connected to the side wall of the connecting rod 95.

[0060] The motor assembly 8 includes a housing box 11, which houses a servo motor 12. The output end of the servo motor 12 is fitted with a drive gear 13, which meshes with a driven gear 15. A horizontal shaft 14 is fitted inside the driven gear 15, and both ends of the horizontal shaft 14 are rotatably connected to the inner wall of the housing box 11. The driven gear 15 meshes with an external gear 16, which is fitted with a rotating shaft 21. A connecting sleeve 17 is fitted on the rotating shaft 21 outside the external gear 16. The connecting sleeve 17 is located at the connection point between the port of the outer tube 1 and the port of the adjusting sleeve 3. The rotating shaft 21 is connected to the screw rod 6.

[0061] The adjusting assembly 20 includes a first bearing ring 18 sleeved on the inner tube 2, the first bearing ring 18 being connected to the port of the adjusting sleeve 3 away from the feed inlet 10, a second bearing ring 201 sleeved on the inner tube 2, the first bearing ring 18 being located between the adjusting sleeve 3 and the second bearing ring 201, the end face of the second bearing ring 201 being in contact with the end face of the first bearing ring 18, the surface of the second bearing ring 201 away from the first bearing ring 18 having a scale 202, the end face of the second bearing ring 201 having two positioning holes 203 with opposite positions, the positioning holes 203 being fitted with pins 204, the pins 204 being fitted with springs 205, the diameter of the springs 205 being not less than the diameter of the positioning holes 203, the end face of the first bearing ring 18 having several evenly distributed limiting holes 206, the limiting holes 206 being fitted with the pins 204, one end of a U-shaped pointer 19 being connected to the side wall of the first bearing ring 18, the other end of the U-shaped pointer 19 being located at the scale 202.

[0062] The coal discharge method of the concentric pipe coal pulverizer in a coalbed methane well includes the following operating steps:

[0063] Step 1: Rotate the first bearing ring 18 to adjust the value of the scale 202, and insert the pin 204 into the limiting hole 206 and the positioning hole 203;

[0064] Step 2: Place the outer pipe 1 into the designated position for discharging pulverized coal and turn on the servo motor 12;

[0065] Step 3: Collect the coal powder into the collection component 9.

[0066] Example 4

[0067] The coalbed methane well concentric pipe coal powder discharge device of the present invention, such as Figure 1 As shown, it includes an inner tube 2 with a seal, an adjusting sleeve 3 with a seal is fitted over the inner tube 2, and an outer tube 1 with a seal is fitted over the adjusting sleeve 3. A spiral rod 6 is spirally wound around the outer wall of the adjusting sleeve 3, and several bristles 7 are provided on the spiral rod 6. A feed inlet 10 is opened on the end face of the outer tube 1. A collection component 9 and a motor component 8 are respectively connected to the outer tube 1 away from the feed inlet 10. The motor component 8 is connected to one end of the spiral rod 6, and the other end of the spiral rod 6 is rotatably connected to the side wall of the adjusting sleeve 3. An annular adjusting component 20 is connected to the end of the adjusting sleeve 3 away from the feed inlet 10. The adjusting component 20 is fitted with the inner tube 2. Several first through holes 4 are opened on the side wall of the inner tube 2, and several second through holes 5 are opened on the side wall of the adjusting sleeve 3.

[0068] The motor assembly 8 includes a housing box 11, which houses a servo motor 12. The output end of the servo motor 12 is fitted with a drive gear 13, which meshes with a driven gear 15. A horizontal shaft 14 is fitted inside the driven gear 15, and both ends of the horizontal shaft 14 are rotatably connected to the inner wall of the housing box 11. The driven gear 15 meshes with an external gear 16, which is fitted with a rotating shaft 21. A connecting sleeve 17 is fitted on the rotating shaft 21 outside the external gear 16. The connecting sleeve 17 is located at the connection point between the port of the outer tube 1 and the port of the adjusting sleeve 3. The rotating shaft 21 is connected to the screw rod 6.

[0069] The adjusting assembly 20 includes a first bearing ring 18 sleeved on the inner tube 2, the first bearing ring 18 being connected to the port of the adjusting sleeve 3 away from the feed inlet 10, a second bearing ring 201 sleeved on the inner tube 2, the first bearing ring 18 being located between the adjusting sleeve 3 and the second bearing ring 201, the end face of the second bearing ring 201 being in contact with the end face of the first bearing ring 18, the surface of the second bearing ring 201 away from the first bearing ring 18 having a scale 202, the end face of the second bearing ring 201 having two positioning holes 203 with opposite positions, the positioning holes 203 being fitted with pins 204, the pins 204 being fitted with springs 205, the diameter of the springs 205 being not less than the diameter of the positioning holes 203, the end face of the first bearing ring 18 having several evenly distributed limiting holes 206, the limiting holes 206 being fitted with the pins 204, one end of a U-shaped pointer 19 being connected to the side wall of the first bearing ring 18, the other end of the U-shaped pointer 19 being located at the scale 202.

[0070] The adjusting sleeve 3 has an annular rotating groove 22 on its side wall near the feed inlet 10 along the axial direction, and the end of the screw rod 6 near the feed inlet 10 is engaged with the rotating groove 22.

[0071] The bristles 7 contact the outer wall of the adjusting sleeve 3 and the inner wall of the outer tube 1 respectively.

[0072] The coal discharge method of the concentric pipe coal pulverizer in a coalbed methane well includes the following operating steps:

[0073] Step 1: Rotate the first bearing ring 18 to adjust the value of the scale 202, and insert the pin 204 into the limiting hole 206 and the positioning hole 203;

[0074] Step 2: Place the outer pipe 1 into the designated position for discharging pulverized coal and turn on the servo motor 12;

[0075] Step 3: Collect the coal powder into the collection component 9.

Claims

1. A device for removing coal fines from a coalbed methane well using concentric tubing, characterized in that, The utility model provides an adjustable feeding device, including the inner tube (2) with seal, the inner tube (2) is equipped with the adjusting sleeve (3) with seal, the adjusting sleeve (3) is equipped with the outer tube (1) with seal, the adjusting sleeve (3) outer wall spiral winding has spiral rod (6), be equipped with a plurality of brush (7) on spiral rod (6), the outer tube (1) end face is provided with feed inlet (10), the outer tube (1) is away from feed inlet (10) respectively with collection subassembly (9) and motor assembly (8) intercommunication, motor assembly (8) with one end of spiral rod (6) is connected, the other end of spiral rod (6) is rotatably connected with adjusting sleeve (3) side wall, the one end of adjusting sleeve (3) away from feed inlet (10) is connected with annular adjusting assembly (20), adjusting assembly (20) is equipped with the inner tube (2), the inner tube (2) side wall is provided with a plurality of first through -hole (4), adjusting sleeve (3) side wall is provided with a plurality of second through -hole (5).

2. The coalbed gas well concentric tubing coal fines removal device of claim 1, wherein, The feed inlet (10) is located between the outer tube (1) and the adjusting sleeve (3).

3. The coalbed gas well concentric tubing coal fines removal device of claim 2, wherein, The adjusting sleeve (3) is provided with a rotating groove (22) near the feed inlet (10) along the axial direction.

4. The coalbed gas well concentric tubing coal fines removal device of claim 3, wherein, The brush (7) is in contact with the outer wall of the adjusting sleeve (3) and the inner wall of the outer tube (1), respectively.

5. The coalbed gas well concentric tubing coal fines removal device of claim 4, wherein, The collection subassembly (9) comprises a spherical temporary storage box (92), one end of the temporary storage box (92) is communicated with a guide hopper (91), the guide hopper (91) is communicated with the outer tube (1); the other end of the temporary storage box (92) is communicated with a discharge pipe (93), the discharge pipe (93) is matched with a sealing plug (94), the temporary storage box (92) is provided with a connecting rod (95), one end of the connecting rod (95) is connected with the sealing plug (94), and a plurality of soft scraping strips (96) are connected to the side wall of the connecting rod (95).

6. The coalbed gas well concentric tubing coal fines removal device of claim 5, wherein, The motor assembly (8) comprises a containing box (11), the containing box (11) is provided with a servo motor (12), the servo motor (12) is provided with a driving gear (13), the driving gear (13) is engaged with a driven gear (15), the driven gear (15) is provided with a horizontal shaft (14), both ends of the horizontal shaft (14) are rotatably connected with the inner wall of the containing box (11), the driven gear (15) is engaged with an external gear (16), the external gear (16) is provided with a rotating shaft (21), the rotating shaft (21) outside the external gear (16) is provided with a connecting sleeve (17), the connecting sleeve (17) is located at the sleeve joint of the outer tube (1) and the adjusting sleeve (3), and the rotating shaft (21) is connected with the spiral rod (6).

7. The coalbed gas well concentric tubing coal fines removal device of claim 6, wherein, The adjusting assembly (20) comprises a first bearing ring (18) sleeved on the inner tube (2), the first bearing ring (18) is connected with the port of the adjusting sleeve (3) away from the feed port (10), the inner tube (2) is sleeved with a second bearing ring (201), the first bearing ring (18) is located between the adjusting sleeve (3) and the second bearing ring (201), the end surface of the second bearing ring (201) is attached to the end surface of the first bearing ring (18), the second bearing ring (201) is provided with a scale (202) away from the surface of the first bearing ring (18), the end surface of the second bearing ring (201) is provided with two opposite positioning holes (203), the positioning holes (203) are matched with a latch (204), the latch (204) is sleeved with a spring (205), the diameter of the spring (205) is not less than the diameter of the positioning hole (203), the end surface of the first bearing ring (18) is provided with a plurality of evenly distributed limiting holes (206), the limiting holes (206) are matched with the latch (204), one end of the U-shaped pointer (19) is connected with the side wall of the first bearing ring (18), the other end of the U-shaped pointer (19) is located at the scale (202).

8. A coal powder discharging method of a coalbed methane well concentric pipe coal powder discharging device, using the coalbed methane well concentric pipe coal powder discharging device according to claim 7, characterized by, The method comprises the following steps: Step 1, rotate the first bearing ring (18) to adjust the scale (202) value, insert the latch (204) into the limiting hole (206) and the positioning hole (203); Step 2, place the outer tube (1) in the designated position of the coal powder, turn on the servo motor (12); Step 3, put the coal powder into the collecting assembly (9).

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